Apparatus for annealing



J. E. ROBEWTSHAVV APPARATUS FOR ANNEALING Filed April 2, 1927 3 Sheets-Sheet @JWM @www I @ewig ik J. E. moBERTsu-mw APPARATUS FOR ANNEALING 5 shams-sheet 2 Filed April 2, 1927 J. mmmimmmw APPARATUS FOR ANNEALING 5 Sheetshee't Filed April 2, 1927 GJM.

Patented Sept. 4, 1928.

-uur'rifzo STATES PATENT OFFICE.

JAMES E. BoEERTsHAw, oE nnnronn, omo, Assrenon ro THE marcan srEEI.v

AND wrancomrmx or NEW JERSEY, .a coarona'rron or NEW JERSEY.

Arrana'rus ron ANNEAIJNG.

Application led April 2,

This invention relates to apparatus for annealing, and more'particularly to apparatus for and methods of bright annealing ferrous .metal material such as wire, strips, and the like, and has for its object the provision of an Figure 3 is an enlarged plan of the seal retaining ring.

Figure 4 is a transverse sectional elevation on the line IV-FV of Figure 2.

Figure 5 isa plan of a modified form of annealing box having a separate inner cover tor each coil of material to be annealed.

Figure 6 is a side elevation, half in section, of the modified construction of box of Figure 5. I

Referring moreparticularly to the drawings, the/numeral 2 designates the base of a double annealing box which is off the usual construction, having. an annular flange 3 adapted to retain the body of sand or other granular material used as a seal.

The material i to be annealed which is shown as consisting'of coils 'of steel strip material A, is mounted on the base 2 in two groups, one on each side of the transverse center line of the base, and an enclosing cover member 4 having an open bottom is mounted over each group of the material so as to completely enclose the material.

The cover 4 is provided around its lower edge with a seal retaining ring 5 which is spaced from the side walls of thecover and also connected thereto by spacing members 6.

A After the ,cover 4 lis mounted in position over .the material to be annealed, the space between thering and side wall of the cover' is filled with agranular sealing material ,7

to .form a sealedl joint between the cover 4 and box base2. The material 7 is preferably composed .of nely divided or granulated ferrous metal, such as ferrous metall filings,

1927. Serial N0. 180,526.

turnings, orl chips, and serves a purpose tolf be described.

After the cover 4 has been positioned and sealed in place, a second or outer box cover 8 1s mounted over Veach of the covers 4. The

cover 8 has an open bottom and is of such and outlet ports 12 and 14, respectively,

through which a flow of non-oxidizing gas 1s provided under pressure to force out the air.

trapped in the space 9 under the cover 8, and tol prevent air seeping into said space through the sealing material 10.

The ferrous metal seal 7 serves as a lter when the box is in use to absorb any oxygen in the gas that may seep` through the seal, therefore eliminating the discoloration of the material .being annealed. Y

The modified construction of annealing box shown in Figures 5 and tis generally the same as that described above and, therefore, the above description applies thereto, except for the inner covers which are omitted, and a plurality offcovers 4a are provided one for each pile of material, and each cover 4l has a seal retaining ring 5a adapted to retain ya quantity of ferrous metal sealing material 7 so as to seal each of the covers 4 with the base 2.

While I have shown and described my irvention as applied to double annealing boxes,l

it will be understood that I do not wish to be limited to double boxes, since it may Lbe ap- 1plied to single boxes as well, and also that the oxes may be of any desired shape so as. to anneal other materials than wire or strips, without departing from the scope of my 'inventio'n as delined in the appended claim.

I claim- Apparatus for bright. annealing compris ing, in combination, a base forsupporting the material tok be annealed, at least onecover y member Supported on lseid base and adapted Vnamed cover, and a seal of granular material to cover the material to be annealed, an anaround the lowenedge of said second named 10 nular sealv retaining ring secured to and cover to form a sealed joint between said base spaced from the side wall of said cover at its and said cover.

5 bottom edge, a seal of'grannlar-ferrous metal In Witness whereof, I have hereunder between said ring and said cover and forming signed my name. y a sealed joint between said cover and said v base, .a second cover enclosing said rst I JAMES E. ROBERTSHAW. 

